Prof Martyn Poliakoff from University of Nottingham explains what the oscillating reactions are. These are reactions that turn a compound from a substance into another one and then back while you are stirring the compound. It can “oscillate” in this way up to 20 times and scientists do not really know why is this happening.

These oscillating reactions are called BZ reactions or Belousov-Zhabotinsky reactions, by the name of the two Russian researchers who discovered these reactions. Honestly, I never knew such reactions could be seen with a naked eye like in the video from above. Fun there is to have!